Wastes produced by agriculture, households, industry, mining, and other human activities can end up in ______________.
groundwater
streams and rivers
oceans
All of these choices
2. Multiple Choice
1 minute
1 pt
About 97% of the water on Earth is ___________________.
fresh water
groundwater
salt water
ice
3. Multiple Choice
1.5 minutes
1 pt
Increase in which gas is primarily responsible for increased global warming?
Carbon dioxide
Water vapor
Methane
Nitric oxides
4. Multiple Choice
1 minute
1 pt
When fertilizers run off farmland into streams and ponds, the nitrogen content of the water increases. This can lead to rapid growth of algae in a process called eutrophication. How can this process affect other organisms in the water?
Oxygen is used up as algae is decomposed, reducing the amount available to other organisms.
The water becomes better able to support aerobic organisms.
The algae provide food for fishes and other organisms, leading to decreased algae populations.
The extra nitrogen provides additional food for the other organisms, increasing their population.
5. Multiple Choice
1 minute
1 pt
Which of the following historical events most likely triggered the largest increase in the human population?
the Black Death plague, which occurred in the mid-1300s
the domestication of wheat crops, which began around 8000 B.C
the fall of the Roman Empire, which occurred around A.D. 800
the Industrial Revolution, which began in the late 1700s
6. Multiple Choice
1 minute
1 pt
largest number of individuals of a population that the environment can support
carrying capacity
primary succession
denitrification
mutualism
7. Multiple Choice
1 minute
1 pt
What is the most dramatic result of deforestation?
land is no longer green and full of life
pictures from space show deforestation
loss of habitat for approximately 70% of the worlds species
people can't explore rainforests
8. Multiple Choice
1 minute
1 pt
Which has the least negative impact on wildlife habitat?
agriculture
development
deforestation
recreation
9. Multiple Choice
1 minute
1 pt
Less rainfall in an area and higher temperatures could lead to ____________.
urbanization
deforestation
desertification
higher pollution
10. Multiple Choice
1 minute
1 pt
What are some reasons deforestation occurs?
clearing land for agriculture, ranching, and mining
just wanting to destroy things
Population moving from rural areas to cities
to make room for infrastructure
11. Multiple Choice
1 minute
1 pt
The natural resources used by society are limited by various factors. Why is coal considered a nonrenewable resource?
Once coal is used up, it can never be replaced.
Coal is a nonrenewable resource, because it comes from the impact of meteors with the Earth
Coal was a renewable resource, until it was mismanaged by humans
Coal is considered a nonrenewable resource, because it takes millions of years to form
12. Multiple Choice
1 minute
1 pt
Fossil fuels are an important natural resource used by society. Which of the following best describes fossil fuels?
They are any liquid fuel derived from once-living matter.
They are organic fuels derived from ancient plants and animals.
They are fuels in which dinosaur fossils are commonly found.
They are naturally occurring inorganic fuels like coal and petroleum.
13. Multiple Choice
1 minute
1 pt
Carbon is released into the atmosphere through all of the following ways except:
respiration
cow flatulence
photosynthesis
all of the above
14. Multiple Choice
1 minute
1 pt
Wind is a __________ energy resource.
Renewable
Nonrenewable
15. Multiple Choice
1 minute
1 pt
In the U.S., laws enacted from the 1780's to the late 1800's reflected the perception that
the amount of land and natural resources in the west was endless.
the natural resources of the west could be used up and required legal protection.
Americans were living amid dirtier air, dirtier water, and more waste and toxic chemicals.